Unit 3 · 5 lessons
Molecular Genetics
How DNA was identified as the genetic material, how it is built, copied and read into proteins, how genes are switched on and off or changed by mutation, and how genetic technologies work and raise legal and ethical questions in Canada.
- 56 practice questions
- 48 flashcards
- 1 interactive lesson
Lessons
- 1DNA: Discovery and StructureThe experiments that proved DNA is the hereditary material, the double helix with its antiparallel strands and base-pairing rules, how DNA is packaged in prokaryotes and eukaryotes, and why each step of a DNA extraction works.11 questions
- 2DNA Replication and RepairWhy DNA copying is semiconservative and how Meselson and Stahl proved it, the enzymes at the replication fork, leading and lagging strands, how proofreading and repair keep errors rare, and why the ends of chromosomes need telomeres.11 questions
- 3Protein Synthesis: Transcription and TranslationThe central dogma, how RNA differs from DNA, transcription and eukaryotic mRNA processing, the properties of the genetic code, and how ribosomes and tRNAs translate mRNA into a polypeptide.Interactive11 questions
- 4Gene Regulation and MutationsWhy cells switch genes on and off, the lac and trp operons in bacteria, the levels of gene control in eukaryotes, the kinds of mutation and their causes, the link to cancer, and how to spot an anomaly in a DNA sequence.11 questions
- 5Biotechnology and Its IssuesRestriction enzymes, ligase and plasmids for making recombinant DNA; gel electrophoresis, PCR, Sanger sequencing and DNA fingerprinting; cloning, transgenic organisms, gene therapy and CRISPR; and the legal, regulatory and ethical questions these raise in Canada and elsewhere.12 questions